Valve.



J. |V|.BARRETT.

VALVE.

APPLICATION man MAR.14.1917.

JOSEPH M.

BARRETT, or rosronIA, omo, Assmnoa To-ffajHEs-c REGULATOR.

COMPANY, F FOSTORIA, OHIO, A CORPORATIN 0F OHIO.

VALVE.

Specification of Letters Patent.

Patented Aug. 13, 1918.

Application led March 14, 1917. i Serial No. 154,666.

To all whom z't may concern:

Beit known that I, JOSEPH M.` BARRETT, a citizen of the United States, residing at F osteria, in the county of Seneca and State of Ohio, have invented a certain new and useful llmprovement in Valves, of which the following is a full, clear, and exact descriplll tion, reference being had to the accompanying drawings.

Th's invention is concerned primarily with double seating conical valves. Valves of this general type have been found welll adapted forl regulating the flow of feed water .to boilers, for example, both by reason of being substantially balanced and because a morta, even regulation may be obtained than with a single seating valve. However, with a double-seating valve it has been diiicult to maintain both seats tight where the valve is subjected to changes in temperature.

lf the valve member on which the conical plugs or disks are formed is `made of a different material from that part of the casing which carries the seats it will have a dfferent' rate of expansion and hence tight seating is liable tobe prevented. 0n the other hand, if made of the same material it is thus restricted to a material suitable for the casing, which is usually not themost desirable material as the casing, and thus expanding" .and contracting commensurately therewith and providing in the casing valve seats of a different material and providing ontheplug seating rings of a material similar to the seats. 'llhisseating material ll, have found may well be of the alloy known as Monel metal, which has the characteristics of being soft and at the same time very tough, and while not suited for the entire plug is very satisfactory for the s'eatlng surfaces of bothtl1e plug and casing.

Another disadvantage of valves of the general type described is that the small annular passageway frequently has a tendency to cause wire-drawing of the fluid passing through the valve openings, which causes rapid wear of the seats. To avoid this wiredraw-ing and also to enablea more regular ow, I provide the plug of such form that it will restrict the effective opening as the valves and valve seats separate, thus requin lng a considerable movement of the valve plug to effect the required opening. I prefer to provide this restriction by means of a conical filler on the valve plug which eX- tends into the seating ring and is of such pitch that its reduces the area of the annular opening for the passage of fluid from the area provided by the space between the seating portion of the valve and the valveseat ring. Moreover by making the filling cone at a differentangle from the seating cone, I divert the passing fluid from the seating surface and thus save it from this attritive wear.

My invention comprises a valve having the characteristics above referred to, or some of them, as hereinafter more fully explained and as summarized in the claims.

In the drawings, Figure 1 isa sectional elevation through a regulating valve embodying luy-invention; Fig. 2 is a fragmentary enlarged side elevation of a p0rtion of the .valve plug; Fig. 3 is a fragmentary axial section through a portion of the valve plug; Fig. 4 is an end view of the valve plug, looking from the right hand end in Fig. 1; Fig. 5 is a diametric cross section through one of the Monel metal rings, carried by the valve plug; Fig. 6 is a fragmentary radial section through the Vvalve plug, illustrating the course of the passing these flat portions areaxially alinecl threaded openings which are occupied by externally threaded rings 20 andl 21, preferably of Monel metal, which form the valve seats.

VOn the sides of their seats these rings are provided with outwardly flaring flanges seating against cutaway shoulders 1n the fiat portions 18 and 19.

The valve plug shown comprises heads 30 and 31, wings 32 connecting such heads,

i groove I prefer to first form the ring guiding wings 33 beyond the head 31, and rings of seating material, preferably Monel metal, 35 and 36 carried on the heads 30 and 31. To insure the' Monel metal ring being held on the valve plug I mount it in an annular groove 34 made about the head of the plug, as shown clearly in Figs. 2 and 3. To mount the Monel metal ring in this an place it in the mold inwhich the valve plug is to be cast and cast the ring. As the Monel metal 1s of a considerable higher melting pointthan brass, it is readily feasible to first cast the Monel metal ring in the proper shape, then place it in the mold and cast the brass body within it.

In order to make'the flow through the valve regular and to secure a .more even graduation'of the lwater flowing through the valve, and prevent wearl on the valve seats, a's heretofore explained, I prefer to restrict the space between the wings adjacent to the seating sides of the respective heads by conical filling portions 37 and .38. These fillers are an integral portion of the body of the I plug. They overhang the annular l'groove 34 and thus coperate with the corresponding head to eectively retain the Monel vmetal ring 35 or 36 in place.

The conical fillers have the effect of restricting the passageway for fluid so that a comparatively long stroke of the valve is required for a given valve area opening. This is important for instance, when the valve is used in a feed water regulator controlled automatically by pressure against a diaphragm operating the valve. Without a restriction of the valve opening, the movement of the diaphragm caused by change of ywaterlevel in boiler might result in a comparatively larger opening of the .valve area than required by actual steaming conditions and 'thereby causing a larger quantityof water to be fed to the boiler than actually required, with the resultthat this change in water flow would be very noticeable on meterin records-also steam output and the .rate of eedingpzwould not be in roportion to T e operation entirely closed or entirely open, but playingv back and forth as the service conditlons require. r

It will be noted that the outer surfaces of the -Monel metal rings `'35 and 36 are inclined substantially 45 degrees, whereas the l surfaces of the lillers 37 and38 are inclined at a much steeper angle. Accordingly, when the Monel metal ring is moved away from plug within the i" lar; too much.

use to which the valve is to be put, but it is sufficient to prevent wire-drawing by the passing fluid and to` insure a large enough opening for a regular flow.

Another result of thefsteep-pitch filling cone is to protect the Monel metal ring from the discharging action of the fluid which flows past the ring when the valve is open. Such fluid is diverted by the filling cone away from the Monel metal ring, whereby the latter is protected and its durability increased. This diversionof the fluid is indicated disagrammatially by the curved lines W in Fig. 6. In this figure it will also be noted that the cone filler 37 overhangs the inner edge of the Monel metal ring 35, as shown at 29, and thus affords a further protection. The construction is similar at the ring 36 and filling cone 38.

With such a valve as above described, I make the casing and the plug body of the same material, for example brass, so that they have the same coeliicient of expansion, and thus the relative distance between the two disks or heads changes in substantially the same proportion as the distance between the valve seats. By making the rings 2O and 21 and 35 and 36 of Monel metal I obtain a very tight seat, for this material is soft enough so that the edge of the stationary seat will form a perfectly tight joint with the ring carried by the plug. The softness ofthe material enables the edge ,of the seat to sink slightly into the ring carried by the piston; at the same time the toughness of the material prevents its being broken down or roughened. The material, however, is not suitable for making the body of the casing or the entire plug. I A

Monel metal ma be purchased on the open market, and understand has a composition approximately as follows: nickel .67 per cent., copper 20 per cent., manganese,

iron and sulfur each a small per cent. It is .to be understood, however, that these proportions are cited simply as illustrative and I do not intend to limlt m self thereto.

Such a double seated disk valve as above described is very well adapted for use in a feed water regulator where the material of the valve must be something which will notv ythe desired result.

The parts shown in Fig. l, not already described, providefor shoving the valve in the opening d1rection by a fluid pressure lib nemesi p against a diaphragm opposed by a spring tending to seat the'valve. I will now briefly describe such parts, though they are not claimed particularly herein.

lin Fig. 1, 40 indicatesa yoke secured to the casing 10 and carrying at its end a ilexible diaphragm 41 clamped between a ring 42 and a head 43. 44 indicates a passage- 4way through the head 43, whereby fluid may be forced against' the diaphragm. @n the other side of the diaphragm is a movable head 45 on the end of a rod 46 which passes through a stutling box 47 carried by the casing and abuts the end ofthe valve plug, at the junction of the wings 33.

It results from the construction described that pressure against the diaphragm may open the valve. The valve is given a ccnstant pressure in the closing direction by a spring 50 which is compressed between a yoke 51 carried by the casing and a head 52 on a rod 53 which bears against the boss 39 on the other end of the valve plug.

rlhe rod 53 passes through a stuffing box 55 which is shown as carried by a removable cap 56 constituting part of the casing. The removal of this cap provides space for the removal of the valve plug and also for the removal of the Monel metal seats, the threaded opening in the casing occupied by the cap being large enough to allow the lpassage of the Monel metal rings, and the threaded opening in the partition 18 being large enough to allow the passage of the Monel ring 21 from the other partition 19.`

The interior ofthe cap 56 also provides a. cavity allowing clearance for the movement of the valve. Lugs 57 in such interior form a suitable abutment for the valve.

I prefer to thread the free end of the stern 53 and mount on it a nut 58. This nut is normallyidle but serves to hold the stem in place when the cap 56 is removed; also, by withdrawing the cotter pin 59 extending through the rod, the nut may be rotated to` draw the stem back from the valve if desired'.

'Ifo force the valve open by hand whenever deslred, l have shown n a hand wheel 60 threaded ony the 4rod 46. and adapted' to vbear against a cross bar 61 of the yoke 40,

whereby the rod 46 may be shoved to the of rings mounted at said openings to provide valve seats, a valve body having two heads and wings connected with each of said heads2 each of said heads having a grooved edge 1n which a ring haring a conical eX- terior is placed, and conical filling portions between the wings ofthe valve body.

2. ln a valve, the combination of an annular valve seat, a valve Vplug having an annular groove, a conical faced seating ring occupying said groove, and a conical filler on the valve plug extending` from said seating ring and slightly overhanging the portion of the seating ring of smallest outer diameter.

3. In a valve, the combination of an annular valve seat, a valve plug having an annular groove, a conical faced seatin ring occupying sald groove, and a conica filler on the valve plug extending from the small edge of the seating ring and having a more acute cone-angle than said seating ring.

4. The combination of a valve casing having an annular valve seat, an integral valve plug havin a headoverhanging the seat, wings exten ing through the seat, a conical filler lying between the wings and extending from the head, and an annular groove about the headadjacent to the large end of the filler, and a continuous metal seating ring of different material from the' plu occupying said groove and held in place etween said head and filler and having a conical exterior coacting lwith the valve seat.

In testimony whereof, I hereunto af'lix my signature. v

JOSEPH-M. BARRETT. 

